wallace



(No Model.) 2 Sheets-Sheet 1'.

A. E. WALLACE.

SEWING MACHINE.

Patented Sept. 6, 1881.

Wit E5525.

1 q /eqimr.

N. PETERS PhowLilhugnlplm-r. Washington. D.c

(No Model.) 2 SheetS -Sheet A. E. WALLACE. SEWING MACHINE.

Patented Sept. 6,1881,

R :2 &

' Q )I v Q m With- E55 E53, R J lr x/gqimr.

NITED STATES PATENT OFFICE.

ALBERT E. WALLACE, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE WEED SEWINGMACHINE COMPANY, OF SAME PLACE.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 246,698, datedSeptember 6, I881.

' Application filed May 21,1881. (No model.)

of Hartford, county of Hartford, State of Connectiout, have inventedImprovements in Sewing-Machines, of which the following description, inconnection with the accompanying drawings, is a specification. I

This invention relates to a sewing-machine of the class making alock-stitch with a needle and shuttle, and has for its objectimprovements in its construction, whereby the parts are simplified.

My invention is an improvement in that class of lock-stitch machineswherein the shuttle is carried by a horizontally-vibrating leveractuated from a vertical lever of the first order vi brated by a cam oreccentric.

My invention consists in improvements in means for operating thefeeding-bar and regulating its movements without lost movement; also,inan improvement-in the take-up; also, in the combination, with thefeeding-bar, of friction device to hold'the feeding-bar except whenmoved positively; also, in improvements in devices for permitting thedriving-wheel to be loosened from the main or needlebar actuatingshaft.

Figure 1 represents an under-side view of a sewing-machine containingmyinvention. Fig. 2represents vertical cross 'and longitudinal sectionaldetails of the friction device for holdingthefeed-barandtheendsupportfortheteed-bar. Fig.3 is a sectionaldetailofthe feed-adjusting device detached from the machine; Fig. 4, afront elevation of the machine, to show the takeup; Fig. 5, an interiordetail of the head of the machine, to illustrate the take-up; Fig. 6, adetail of the head, broken outto show the take-up; Fig. 7, a verticalcross-section of the rear part of the machine on the dotted line 2, Fig.1,and the vertical lever of the shuttle-moving devices, looking towardthe front of the machine. Fig. 8, a sectional detail of the loose-wheelconnection; and Fig. 9, a detail, to be referred to.

The frame A of the machine (of suitable shape) supports the rotary shafta, provided at its front end with any usual crank-pin to enter thegrooved block a, secured to the needlebar, all as common. This shaft hasupon it two cams, b 0, made in one or two pieces. The cam 12 entersbetween the forks at the upper end of the usual vertical lever, b,pivoted atb and vibrates the said lever, causingit, with its ball-likeend, to vibrate the horizontal shuttlecarrying lever b pivoted at If,all as usual. The cam c enters an openingof thelink c,provided at itslower end with a socket, 5; The link 0 is jointed to a link, 0 the outerend of which, in turn, is jointed to the screw 0 of the feed adjustingor controlling device, having upon it the milled nut 0 a portion of theperiphery of which is extended up through a slot in the bed of themachine just sutficient in width to receive it, the periphery of thesaid nut being easily reached by the operator to turn the said nut andcause it to move the screw horizontally, while the not has only amovement of rotation.

The outward movement of the screw 0 is regulated by the head of thestop-screw c".

The socket 5 receives within it a short cylinder, f, provided with ahole to receive the arm f, pinned or otherwise secured to thefeedoperating rock-shaft h, supported in bearings h h", and having atits other end a slotted arm, h such as now used in the well-known W'eedsewing-machine, it engaging the pin h of the usual feed-bar,ih

The rear end of the feed-bar (see Fig. 2) is slotted to fit over ascrew, 6, which supports thefeed-bar during its movements. This screw isextended through a spring, a, disk 1, a leather or other washer, P, thenthrough the slot in the feed-bar, and another washer, l and screwed intoa loose disk, m.

The disks I m are prevented from rotating by means of the guide-pins 0;but they may move longitudinally, as the screw is made to compress thespring a to thus cause the washers Z l to pinch the feed-bar more orless and prevent it being moved, except positively for just the distanceintended.

The take-up arm 19 is shown as made of a wire, bent, as shown in Figs.at and 6, and adapted to vibrate in front of the head of the machinefrom the dotted to the full line position, Fig. 4, and draw theneedle-thread back with it through the staple 1" when taking up theslack in the needle-thread.

The arm 10 is inserted through a hole in a cap, 10, slipped over the endof a stud,w,form1n g part of the slotted arm of the take-up, the

slot in the said arm receiving a roll on a stud, w, connected with andprojectingfrom the front side of the needle-bar.

The screw 8, extended through the stud w, impinges against the arm 19and holds it firmly in place. The said arm 1), stud w, and arm pconstitute the take-up proper. This takeup is operated positively inboth directions from the needle-bar to furnish slack in theneedle-thread for the passage of the shuttle when the needle is belowthe fabric and take up the slack in the needle-thread and draw thestitch taut as the needle-bar and needle rise, the take-up remainingstationary in its dotted-line position, Fig. 4, during the last por tionof the ascent and the first part of the descent of the needle-bar.

The shaft (1 has fixed to its outer end the friction-disk B, theperiphery of which is entered into a recess in, and so as to bearagainst, an annular shoulder, 10, made at the outer face of the beltreceiving or driving wheel D, placed loosely on the said shaft a. Thehub of this wheel has an annular groove,12, which receix'es a shoe, 13.(See Figs. 8 and 9.) A screw shank, 15, extended from this shoe througha hole in the frictiou-pla to B, receives athumb-nut,14t. This shoe,shank,and thumbnut constitute the loose-wheel locking device. The shoeonce inserted in the annular groove 12 remains there and acts as a headfor the shank 15, so that as the nut 14 is turned the wheel D may bedrawn more or less closely against the fast friction-disk B. When heldclosely to the said disk the wheel takes hold of and drives the disk andshaft, but at all other times, as when the wheel is released fromdriving-pressure against the said disk, the

wheel D runs loose on and the shaft a remains at rest.

I claim-- 1. The shaft a, its eccentric or cam, link 0, provided withsocket 5, link 0 screw 0 and nut 0 combined with the feed-barrocker-shaft and its arms f and h, substantially as described.

2. The link 0, provided with the socket 5, and the link 0 combined withthe screw 0, pivoted to the said link, and with the nut extended upthrough a slot in the bed of substantially the same width as the saidnut, as and for the purpose set forth.

3. The feed-bar, slotted atone end,combined with the friction devicescomposed of the two disks and screw, spring, and washers, substantiallyas described.

4. The take-up composed of the slotted arm 1), its stud w, and arm 10,connected with the said stud, as described, combined with the needle-barand its stud, to enter the slot of the arm p and operate the take-uppositively, as set forth.

5. The shafta. and friction-disk fast thereon,

and the wheel-lockin g device composed of the

